A replaceable head toothbrush

Abstract

The utility model relates to oral care tool's technical field especially, more particularly to a kind of replaceable head toothbrush, including detachably connected brush head and brush handle, first connecting part is equipped on the brush head, second connecting part corresponding with the first connecting part is equipped on the brush handle;The brush head is further equipped with the reinforcing portion extending towards the brush handle, the brush handle is equipped with the mating groove corresponding with the reinforcing portion. The detachable connection of brush head and brush handle is realized by the cooperation and connection of first connecting part and second connecting part, the disassembly and replacement of brush head are facilitated, meanwhile, the additional limiting structure is further formed between brush head and brush handle by the embedding of reinforcing portion and mating groove two, the connection stability of brush head and brush handle can be enhanced, the problem that brush head is easily displaced and easily dropped due to external force is avoided, the safety of user's tooth brushing is improved, and the smoothness of user's tooth brushing is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of oral care tools, and in particular to a replaceable head toothbrush. Background Technology

[0002] As an essential tool for daily oral hygiene, the structure and function of toothbrushes have long been a focus of attention. Nowadays, some toothbrushes on the market feature detachable brush heads and handles, allowing users to replace only the brush head when the bristles become worn or soiled, rather than discarding the entire toothbrush. This saves materials, reduces costs, and minimizes plastic waste.

[0003] Most existing detachable toothbrush heads and handles are connected using simple clips, slots, or magnetic attachment. In daily use, especially when applying pressure or performing rotating brushing motions, the brush head often becomes loose, shifts, or even falls off. This not only affects normal use but may also cause accidental injury to the oral cavity, posing certain safety hazards.

[0004] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0005] This invention addresses the problem that existing detachable toothbrushes often use simple snaps, slots, or magnetic adsorption to connect the brush head and handle, which can easily lead to the brush head becoming loose, shifting, or even falling off. This not only affects normal use but may also cause accidental injury to the oral cavity, posing certain safety hazards. Therefore, this invention proposes a replaceable toothbrush.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A replaceable-head toothbrush includes a toothbrush body, the toothbrush body including a detachably connected brush head and a brush handle, the brush head having a first connecting portion, and the brush handle having a second connecting portion corresponding to the first connecting portion; the brush head also has a reinforcing portion extending toward the brush handle, and the brush handle has a mating groove corresponding to the reinforcing portion.

[0007] As described above, in a replaceable toothbrush, the first connecting part includes a first assembly cavity disposed within the brush head and an elastic locking member disposed within the first assembly cavity. A clearance cavity communicating with the first assembly cavity is formed between the elastic locking member and the brush head. The brush handle can be engaged into the first assembly cavity via a second connecting part. The second connecting part includes a locking groove disposed on the brush handle and corresponding to the elastic locking member. The elastic locking member is provided with a locking part, and the locking part can be engaged into or separated from the locking groove by elastic deformation of the elastic locking member.

[0008] As described above, in a replaceable toothbrush, the second connecting part further includes a pin connected to the brush handle, the locking groove being located outside the pin, and the first connecting part further includes a second assembly cavity communicating with the first assembly cavity, the second assembly cavity being adapted to the pin.

[0009] As described above, in a replaceable-head toothbrush, the brush head is provided with a limiting structure for restricting the insertion position of the second connecting part within the brush head. The limiting structure includes a first limiting step disposed within the first assembly cavity, and the outer side of the second connecting part has a first abutting surface corresponding to the first limiting step; and / or, The limiting structure includes a second limiting step, which is disposed between the first assembly cavity and the second assembly cavity, and the outer side of the second connecting part is provided with a second abutting surface corresponding to the second limiting step.

[0010] As described above, in a replaceable-head toothbrush, a guide structure is provided between the brush head and the handle to guide the second connecting part to engage with the brush head. The guide structure includes a first guide portion located at the end of the handle and facing the elastic locking member, through which the elastic locking member is guided to deform into the relief cavity; and / or The guiding structure includes a second guide portion disposed at the bottom of the locking portion, through which the locking portion is guided to engage with the locking groove; and / or The guide structure includes a third guide portion located at the end of the pin, through which the pin is guided to engage with the second assembly cavity.

[0011] As described above, in a replaceable toothbrush, the reinforcing part has an insert portion embedded in the surface of the brush head and an extension portion connected to the insert portion. The extension portion protrudes relative to the end of the brush head. The mating groove is provided on the surface of the brush handle and is adapted to the extension portion of the reinforcing part. The reinforcing part is made of a soft material and has an anti-slip surface.

[0012] In the replaceable-head toothbrush described above, the reinforcing part is integrally formed with the brush head; or, The reinforcing part is installed on the brush head.

[0013] As described above, in a replaceable toothbrush, the inner side of the reinforcing part is provided with a support part corresponding to the extension part, the mating groove is adapted to the extension part of the reinforcing part and the support part, and the support part is made of a rigid material.

[0014] As described above, in a replaceable head toothbrush, at least a portion of the surface of the reinforcing part protrudes outward from the toothbrush body to form a protrusion, and the protrusion has a plurality of spaced protrusions along its length to form the anti-slip surface.

[0015] As described above, in a replaceable toothbrush, a sealing part is provided on one side of the reinforcing part, and an assembly gap adapted to the sealing part is also provided between the brush head and the brush handle.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. The brush head and brush handle are detachably connected by the first connecting part and the second connecting part, which facilitates the disassembly and replacement of the brush head and helps to protect the user's oral health. The connection between the brush head and the brush handle also simplifies the disassembly and assembly of the brush head and optimizes the user experience. 2. A reinforcing part extending towards the brush handle is added to the brush head, and a corresponding matching groove is provided on the brush handle. The fitting of the reinforcing part and the matching groove further forms an additional limiting and fixing structure between the brush head and the brush handle, which can enhance the connection stability between the brush head and the brush handle, avoid the problem of the brush head being easily displaced or falling off due to external force, improve the safety of brushing teeth, and ensure the smoothness of brushing teeth.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a perspective view of the replaceable head toothbrush of this utility model; Figure 2 Disassembly of the replaceable head toothbrush of this utility model Figure 1 ; Figure 3 Disassembly of the replaceable head toothbrush of this utility model Figure 2 ; Figure 4 This is a rear view of the replaceable head toothbrush of this utility model; Figure 5 for Figure 4 Sectional view A-A in the middle; Figure 6 for Figure 5 A magnified view of a portion of the image. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] Example 1: like Figures 1 to 5 As shown, this utility model provides a replaceable toothbrush, including a toothbrush body. The toothbrush body includes a detachably connected brush head 1 and a brush handle 2. The brush head 1 is provided with a first connecting part 11, and the brush handle 2 is provided with a second connecting part 21 corresponding to the first connecting part 11. The brush head 1 is also provided with a reinforcing part 12 extending toward the brush handle 2, and the brush handle 2 is provided with a mating groove 22 corresponding to the reinforcing part 12.

[0023] In this invention, the brush head 1 and the handle 2 are detachably connected by the first connecting part 11 and the second connecting part 21, which facilitates the disassembly and replacement of the brush head 1 and helps protect the user's oral health. Furthermore, the connection between the brush head 1 and the handle 2 simplifies the disassembly and assembly of the brush head 1, optimizing the user experience. Secondly, a reinforcing part 12 extending towards the handle 2 is added to the brush head 1. The reinforcing part 12 extends along the axial direction of the toothbrush body towards the handle 2, and a corresponding mating groove 22 is provided on the handle 2. The engagement of the reinforcing part 12 and the mating groove 22 further forms an additional limiting and fixing structure between the brush head 1 and the handle 2, enhancing the connection stability between the brush head 1 and the handle 2. This prevents the brush head 1 from easily shifting or falling off due to external forces, improving the user's brushing safety and ensuring smooth brushing.

[0024] Optionally, the reinforcing part 12 is disposed on one side of the first connecting part 11. The reinforcing part 12 may be disposed inside the brush head 1 or on the surface of the brush head 1. The mating groove 22 is disposed in the brush handle 2 corresponding to the reinforcing part 12.

[0025] Optionally, the reinforcing part 12 may be made of a rigid material, and the reinforcing part 12 may be integrally formed with the brush head 1.

[0026] Furthermore, such as Figure 5 and Figure 6 As shown, the first connecting part 11 includes a first assembly cavity 111 disposed in the brush head 1 and an elastic locking member 112 disposed in the first assembly cavity 111. A clearance cavity 113 communicating with the first assembly cavity 111 is formed between the elastic locking member 112 and the brush head 1. The brush handle 2 can be engaged into the first assembly cavity 111 through the second connecting part 21. The second connecting part 21 includes a locking groove 211 disposed on the brush handle 2 and corresponding to the elastic locking member 112. The elastic locking member 112 is provided with a locking part 1121. The locking part 1121 faces the first assembly cavity 111. The elastic locking member 112 generates elastic deformation so that the locking part 1121 can be engaged into the locking groove 211 or separated from the locking groove 211. The clearance cavity 113 is used to make way for the elastic deformation of the elastic locking member 112.

[0027] In this embodiment, the end of the brush handle 2 can be snapped into the first assembly cavity 111 so that the locking groove 211 is snapped into the first assembly cavity 111 and opposite to the locking part 1121. When the brush handle 2 is inserted into the first assembly cavity 111, the elastic locking member 112 is squeezed by external force to generate elastic deformation and moves into the relief cavity 113. Its locking part 1121 can be automatically slid into the locking groove 211 of the brush handle 2 by the rebound force of the elastic locking member 112 to complete the snapping. When disassembling, only appropriate external force needs to be applied to deform the elastic locking member 112 again, and the locking part 1121 can be disengaged from the locking groove 211 to achieve quick separation of the brush head 1. The engagement of the first connecting part 11 and the second connecting part 21 does not require complicated multi-step operations such as rotation and pressing. Users can easily complete the installation and disassembly of the brush head 1 with one hand, which greatly simplifies the disassembly and replacement process of the brush head 1 and improves the convenience of daily use. Secondly, the elastic locking element 112 is integrated into the first assembly cavity 111 of the brush head 1, forming a built-in locking structure with the locking groove 211 of the brush handle 2. This avoids the problems of easy accumulation of dirt and wear caused by exposed buckles in traditional toothbrushes, resulting in a more compact and concealed overall structure. Furthermore, the standardized design of the elastic locking element 112 and locking groove 211 between the brush head 1 and brush handle 2 allows for the connection of brush heads 1 with different functions or materials to the same brush handle 2. Users only need to replace different types of brush heads 1 to meet diverse oral care needs, without having to replace the entire toothbrush, thus reducing usage costs. Moreover, if the elastic locking element 112 is damaged, only the brush head 1 containing the first connecting part 11 needs to be replaced to restore functionality, further reducing user costs.

[0028] Optionally, the elastic locking component 112 can be made of a material with a certain degree of elasticity, such as PP, PBT, PC, PET, POM, TPE, TPU, thermoplastic elastomer or rubber, etc. During repeated elastic deformation, it can maintain stable elastic performance, is not easy to fail due to fatigue, and can maintain a reliable locking effect after long-term use, thus extending the service life of the toothbrush.

[0029] Optionally, the elastic locking element 112 is integrally formed with the brush head 1.

[0030] Furthermore, such as Figure 5 and Figure 6 As shown, the second connecting part 21 further includes a pin 212 connected to the brush handle 2, and the locking groove 211 is located outside the pin 212. The first connecting part 11 also includes a second assembly cavity 114 communicating with the first assembly cavity 111, and the second assembly cavity 114 is adapted to the pin 212.

[0031] In this embodiment, the pin 212 is fixedly connected to the side of the brush handle 2 facing the brush head 1, and the second assembly cavity 114 is located in front of the first assembly cavity 111 along the insertion direction of the brush handle 2. When the brush handle 2 is inserted into the first assembly cavity 111 of the brush head 1, the pin 212 first enters the matching second assembly cavity 114. Through the tight cooperation between the pin 212 and the second assembly cavity 114, the relative position of the brush handle 2 and the brush head 1 is initially guided and limited, ensuring that the brush handle 2 is accurately inserted into the preset position of the first assembly cavity 111. Subsequently, the locking groove 211 on the brush handle 2 and the elastic locking member 112 in the brush head 1 are further engaged and locked, further enhancing the connection stability between the brush head 1 and the brush handle 2, greatly reducing the risk of the brush head 1 easily loosening or falling off, and at the same time... This design avoids the problem of brush head 1 and brush handle 2 failing to engage due to excessive deformation of the elastic locking component 112, thus extending the service life of brush head 1. Secondly, the pin 212 can be cylindrical, prismatic, etc., without specific limitations. The shape of the pin 212 precisely matches the inner shape of the second assembly cavity 114, ensuring that the brush handle 2 enters the first assembly cavity 111 in a specific direction and position when inserted. This avoids misalignment and engagement failure of the elastic locking component 112 and locking groove 211 due to deviation in the insertion direction of the brush handle 2, improving the assembly efficiency of brush head 1 and brush handle 2. It also ensures that the relative position of the elastic locking component 112 and locking groove 211 is consistent after each installation, ensuring that the locking part 1121 accurately engages in the locking groove 211, further improving the reliability of the connection and the consistency of the user experience.

[0032] Alternatively, the second assembly cavity 114 is provided with an inclined wall 1141 on the inner side, and the inner diameter of the second assembly cavity 114 is slightly reduced along the insertion direction of the pin 212, so that the pin 212 forms an interference fit in the second assembly cavity 114, thereby improving the snap-fit ​​fixing strength between the pin 212 and the brush head 1.

[0033] Alternatively, the pin 212 may be integrally formed with the brush handle 2, or the pin 212 may be fixedly connected to the brush handle 2 by means of insertion and adhesive bonding, without specific limitation here.

[0034] As an optional embodiment of this solution, such as Figure 6 As shown, the brush head 1 is provided with a limiting structure 3 for restricting the insertion position of the second connecting part 21 within the brush head 1. By cooperating with the corresponding abutting surface on the second connecting part 21, the connection depth between the brush head 1 and the handle 2 is precisely controlled, effectively solving problems such as unstable connection, difficult assembly, or poor sealing caused by inconsistent connection depths in existing detachable toothbrushes. This further ensures the stability and reliability of the connection structure between the brush head 1 and the handle 2, improving its anti-loosening performance during brushing. Simultaneously, by setting the limiting structure 3, the first connecting part 11 and the second connecting part 21 can form a standardized design, improving the efficiency of the brush head 1. The standardization of connection depth ensures that the relative positions of the elastic locking element 112 and the locking groove 211, and the pin 212 and the second assembly cavity 114 are consistent after each installation, thus further ensuring the repeatability and reliability of the connection. This avoids the elastic locking element 112 from being over-compressed and deformed due to excessive insertion depth, and avoids the pin 212 and the second assembly cavity 114 from being worn due to excessive compression. This extends the service life of the first connecting part 11 and the second connecting part 21, reduces the risk of the brush head 1 becoming loose or falling off due to the failure of the first connecting part 11 and the second connecting part 21, and improves the overall durability of the toothbrush.

[0035] Further optionally, the limiting structure 3 includes a first limiting step 31, which is disposed within the first assembly cavity 111, and a first abutting surface 32 corresponding to the first limiting step 31 is provided on the outer side of the second connecting portion 21; and / or, the limiting structure 3 includes a second limiting step 33, which is disposed between the first assembly cavity 111 and the second assembly cavity 114, and a second abutting surface 34 corresponding to the second limiting step 33 is provided on the outer side of the second connecting portion 21.

[0036] As an optional embodiment of this solution, such as Figure 6As shown, a guide structure 4 is provided between the brush head 1 and the brush handle 2 to guide the second connecting part 21 to engage with the brush head 1. By setting the guide structure 4, the smoothness of the connection process between the brush head 1 and the brush handle 2, the engagement accuracy, and the user operation experience are improved.

[0037] Further optionally, the guide structure 4 includes a first guide portion 41 located at the end of the brush handle 2 and facing the elastic locking member 112. The first guide portion 41 guides the elastic locking member 112 to deform into the relief cavity 113, so that the elastic locking member 112 undergoes controllable elastic deformation into the relief cavity 113, avoiding rigid obstruction or excessive local deformation of the elastic locking member 112 due to direct collision; and / or, the guide structure 4 includes a second guide portion 42 located at the bottom of the locking part 1121. The second guide portion 42 guides the locking part 1121 to engage with the locking groove 211, ensuring accurate alignment between the locking part 1121 and the locking groove 211; and / or, the guide structure 4 includes a third guide portion 43 located at the end of the pin 212. The third guide portion 43 guides the pin 212 to engage with the second assembly cavity 114, avoiding jamming between the pin 212 and the inner wall of the assembly cavity.

[0038] Further optionally, the first guide portion 41, the second guide portion 42 and the third guide portion 43 are respectively configured as inclined straight surfaces or curved surfaces.

[0039] Example 2: Based on the first embodiment described above, this second embodiment provides another optional embodiment of a replaceable-head toothbrush. The difference between this second embodiment and the first embodiment is that, as... Figure 2 , 3 As shown in Figure 6, the reinforcing part 12 has an insert portion 12a embedded in the surface of the brush head 1 and an extension portion 12b connected to the insert portion 12a. The extension portion 12b protrudes relative to the end of the brush head 1. The mating groove 22 is provided on the surface of the brush handle 2 and is adapted to the extension portion 12b of the reinforcing part 12. The reinforcing part 12 is made of soft material and has an anti-slip surface 121.

[0040] In this embodiment, the external anti-slip pad function of a traditional toothbrush is integrated with the connection and reinforcement structure between the brush head 1 and the handle 2. This design not only achieves the limiting and reinforcement of the connection structure between the brush head 1 and the handle 2, but also provides reliable anti-slip performance through the anti-slip surface 121 on the surface of the reinforcement part 12. This avoids the problem of the anti-slip pad being easily detached when separately glued to the surface of the handle 2 in traditional toothbrushes. The anti-slip and reinforcement functions work synergistically, significantly improving the overall connection stability and durability of the toothbrush. Furthermore, one end of the reinforcement part 12 is embedded in the surface of the brush head 1, and the extension portion of the reinforcement part 12... The 12b is snapped into the mating groove 22 of the brush handle 2. The reinforcing part 12 can cover the gap between the brush head 1 and the brush handle 2, which helps to prevent water, toothpaste foam and other substances from entering the toothbrush through the gap between the brush head 1 and the brush handle 2. It is not easy for dirt to accumulate, making it easy to clean and maintain in daily use, improving the toothbrush's anti-fouling performance, and helping to protect the toothbrush, thereby extending the toothbrush's service life. In addition, when the user disassembles and replaces the brush head 1, the reinforcing part 12 can be disassembled and installed synchronously with the brush head 1, which is convenient for replacing the anti-slip pad on the toothbrush and improving the toothbrush's anti-fouling and anti-slip performance.

[0041] Optionally, the toothbrush body is provided with a thumb press position, and the reinforcement part 12 is located at the thumb press position; when the user brushes his / her teeth, the pressure of the thumb acts directly on the anti-slip surface 121 of the reinforcement part 12, which enhances the anti-slip performance of the toothbrush. Even in a wet environment (such as after rinsing the mouth) or when the hands are wet, the user can still hold the toothbrush firmly and apply force accurately.

[0042] Optionally, the interlocking portion 12a and the extension portion 12b of the reinforcing part 12 can be combined to form a straight, Z-shaped, L-shaped or T-shaped reinforcing part, etc., without specific limitation here; wherein, the interlocking portion 12a is embedded in the brush head 1, the extension portion protrudes from the end of the brush head 1, and the snap-fit ​​direction of the extension portion relative to the mating groove 22 is parallel to the disassembly and assembly direction of the brush head 1 and the brush handle 2, so as to facilitate the user to disassemble and assemble the entire brush head 1.

[0043] Optionally, the reinforcing part 12 is integrally formed with the brush head 1; the reinforcing part 12 can be made of soft materials such as TPE, TPU, silicone, etc., and is injection molded on the brush head 1 through a coating process, and the Shore hardness of the reinforcing part 12 is <80A.

[0044] Optionally, the reinforcing part 12 is mounted on the brush head 1; the reinforcing part 12 can be fixed on the brush head 1 by ultrasonic welding or adhesive bonding, etc., which is not specifically limited here.

[0045] As an optional embodiment of this solution, such as Figure 3As shown, the inner side of the reinforcing part 12 is provided with a support part 13 corresponding to the extension part 12b. The mating groove 22 is adapted to the extension part 12b of the reinforcing part 12 and the support part 13. The support part 13 is made of a rigid material. In this embodiment, the support part 13 is a rigid support part 13, which can provide additional rigid support for the soft reinforcing part 12, preventing the soft reinforcing part 12 from being excessively squeezed by external forces when the brush head 1 and the brush handle 2 are connected, thus preventing easy wear and deformation, thereby protecting the soft reinforcing part 12. Through the synergistic cooperation between the rigid support part 13 and the soft reinforcing part 12, the stability of the connection between the brush head 1 and the brush handle 2, the deformation resistance of the soft reinforcing part 12, and the overall durability of the toothbrush are significantly improved. In addition, as Figure 6 As shown, the soft reinforcing part 12 is at least partially embedded in the mating groove 22. When the user brushes their teeth or disassembles the brush head 1, the toothbrush as a whole is subjected to forces in different directions. At this time, the soft reinforcing part 12 can buffer and absorb part of the force, which helps to protect the brush head 1 and the brush handle 2, especially the snap-fit ​​structure between the elastic locking part 112 and the locking groove 211, thereby extending the service life of the toothbrush.

[0046] Optionally, the support 13 and the brush head 1 are integrally formed.

[0047] As an optional embodiment of this solution, such as Figure 2 As shown, at least a portion of the surface of the reinforcing part 12 protrudes outward from the toothbrush body to form a protrusion 122, and the protrusion 122 has a plurality of spaced protrusions 123 along its length to form the anti-slip surface 121. By providing the protrusion 122 on the surface of the reinforcing part 12, the overall thickness of the reinforcing part 12 can be increased, the structural strength of the soft reinforcing part 12 can be improved, and the user's pressing comfort can be improved. Secondly, optionally, the protrusion 122 may be provided with a transverse protrusion 123 or an oblique protrusion 123, which is not specifically limited here. By providing a plurality of protrusions 123 on the surface of the protrusion 122, the surface of the protrusion 122 forms an uneven anti-slip surface 121, which further improves the anti-slip performance of the soft reinforcing part 12.

[0048] As an optional embodiment of this solution, such as Figure 3 and Figure 6As shown, a sealing part 14 is provided on one side of the reinforcing part 12, and an assembly gap 5 adapted to the sealing part 14 is also provided between the brush head 1 and the brush handle 2. In this embodiment, the sealing part 14 is arranged circumferentially around the end of the brush head 1, and both ends of the sealing part 14 are respectively connected to the reinforcing part 12. The sealing part 14 is located in the assembly gap 5 between the brush head 1 and the brush handle 2. The sealing part 14 fits tightly against the connection interface between the brush head 1 and the brush handle 2, forming a physical barrier that can prevent food residue, toothpaste foam, oral moisture and other dirt from entering the toothbrush, thereby protecting the internal structure of the toothbrush and extending its service life. At the same time, it can keep the connection between the brush head 1 and the brush handle 2 clean and dry, significantly improving the hygiene performance of the toothbrush. Secondly, by filling the assembly gap 5 with the sealing part 14, during the brushing process, the sealing part 14 can further prevent the brush head 1 from loosening or shifting due to external force, further ensuring the reliability of the connection between the brush head 1 and the brush handle 2, improving the brushing effect and the safety of use.

[0049] Optionally, the sealing part 14 and the reinforcing part 12 are integrally formed by soft material. During production and processing, the sealing part 14 and the reinforcing part 12 can be injection molded on the brush head 1 by a rubber coating process.

[0050] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A replaceable head toothbrush, comprising a toothbrush body, characterized in that, The toothbrush body includes a detachably connected brush head (1) and a brush handle (2). The brush head (1) is provided with a first connecting part (11), and the brush handle (2) is provided with a second connecting part (21) corresponding to the first connecting part (11). The brush head (1) is also provided with a reinforcing part (12) extending toward the brush handle (2), and the brush handle (2) is provided with a mating groove (22) corresponding to the reinforcing part (12).

2. A replaceable head toothbrush as described in claim 1, characterized in that, The first connecting part (11) includes a first assembly cavity (111) disposed in the brush head (1) and an elastic locking member (112) disposed in the first assembly cavity (111). A clearance cavity (113) communicating with the first assembly cavity (111) is formed between the elastic locking member (112) and the brush head (1). The brush handle (2) can be engaged into the first assembly cavity (111) through the second connecting part (21). The second connecting part (21) includes a locking groove (211) disposed on the brush handle (2) and corresponding to the elastic locking member (112). The elastic locking member (112) is provided with a locking part (1121). The elastic locking member (112) generates elastic deformation so that the locking part (1121) can be engaged into the locking groove (211) or separated from the locking groove (211).

3. A replaceable head toothbrush as described in claim 2, characterized in that, The second connecting part (21) further includes a pin (212) connected to the brush handle (2), the locking groove (211) is located outside the pin (212), and the first connecting part (11) further includes a second assembly cavity (114) communicating with the first assembly cavity (111), the second assembly cavity (114) being adapted to the pin (212).

4. A replaceable head toothbrush as described in claim 3, characterized in that, The brush head (1) is provided with a limiting structure (3) for restricting the insertion position of the second connecting part (21) within the brush head (1). The limiting structure (3) includes a first limiting step (31), which is located within the first assembly cavity (111). The outer side of the second connecting part (21) is provided with a first abutting surface (32) corresponding to the first limiting step (31); and / or, The limiting structure (3) includes a second limiting step (33), which is located between the first assembly cavity (111) and the second assembly cavity (114). The outer side of the second connecting part (21) is provided with a second abutting surface (34) corresponding to the second limiting step (33).

5. A replaceable head toothbrush as described in claim 3, characterized in that, A guide structure (4) is provided between the brush head (1) and the brush handle (2) to guide the second connecting part (21) to engage with the brush head (1). The guide structure (4) includes a first guide part (41) located at the end of the brush handle (2) and facing the elastic locking member (112). The first guide part (41) guides the elastic locking member (112) to deform into the relief cavity (113); and / or, The guide structure (4) includes a second guide portion (42) located at the bottom of the locking portion (1121), through which the locking portion (1121) is guided to engage with the locking groove (211); and / or, The guide structure (4) includes a third guide portion (43) located at the end of the pin (212), through which the pin (212) is guided to engage with the second assembly cavity (114).

6. A replaceable-head toothbrush as described in any one of claims 1 to 5, characterized in that, The reinforcing part (12) has an insert portion (12a) embedded in the surface of the brush head (1) and an extension portion (12b) connected to the insert portion (12a). The extension portion (12b) protrudes relative to the end of the brush head (1). The mating groove (22) is provided on the surface of the brush handle (2) and is adapted to the extension portion (12b) of the reinforcing part (12). The reinforcing part (12) is made of soft material and has an anti-slip surface (121) on it.

7. A replaceable head toothbrush as described in claim 6, characterized in that, The reinforcing part (12) is integrally formed with the brush head (1); or, The reinforcing part (12) is installed on the brush head (1).

8. A replaceable head toothbrush as described in claim 6, characterized in that, The inner side of the reinforcing part (12) is provided with a support part (13) corresponding to the extension part (12b). The mating groove (22) is adapted to the extension part (12b) of the reinforcing part (12) and the support part (13). The support part (13) is made of hard material.

9. A replaceable head toothbrush as described in claim 6, characterized in that, The surface of the reinforcing part (12) protrudes outward from the toothbrush body to form a protrusion (122), and the protrusion (122) is provided with a plurality of spaced protrusions (123) along its length to form the anti-slip surface (121).

10. A replaceable head toothbrush as described in claim 6, characterized in that, The reinforcing part (12) has a sealing part (14) on one side, and the brush head (1) and the brush handle (2) also have an assembly gap (5) that is compatible with the sealing part (14).

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